erase member functions of std::map class template do not conform to standard:

std::map<...>::erase(iterator) and std::map<...>::erase(iterator, iterator) both return void when they should return iterator (23.3.1):

bits/stl_map.h:444

      void
      erase(iterator __position)
      { _M_t.erase(__position); }

bits/stl_map.h:474

      void
      erase(iterator __first, iterator __last)
      { _M_t.erase(__first, __last); }


The standard requires signature of these functions to be:

      iterator erase(iterator);
      iterator erase(iterator, iterator);